High-pressure plunger pump, and use of a high-pressure plunger pump

A method for operating a high-pressure plunger pump comprising a valve housing comprising a high-pressure connection and a low-pressure connection;

• a first driveshaft;
• a second driveshaft;
• a third driveshaft coupling the first and second driveshafts;
• first and second plunger arrangements, each comprising a working chamber;
• a plunger arranged to move axially back and forth in the working chamber;
• a pressure valve sealably connected, via a high-pressure line in the valve housing, to the working chamber, wherein the high-pressure line is coupled to the high-pressure connection;
• and a suction valve sealably connected, via a low-pressure line in the valve housing, to the working chamber, wherein the low-pressure line is coupled to the low-pressure connection;
• a control unit;
• and a generator coupled to the first driveshaft, wherein the plunger of the first plunger arrangement is coupled to the first driveshaft;
• and wherein the plunger of the second plunger arrangement is coupled to the second driveshaft, the method comprising:
• supplying, by the high-pressure plunger pump in a pumping operation, fluid at a predetermined high pressure to a process assembly, wherein, depending on a rotational position of the first driveshaft, the pressure and suction valves of one of the first and second plunger arrangements are controlled via the control unit such that the plunger of the respective one of the first and second plunger arrangement is driven by the first driveshaft;
• and
• supplying, by the high-pressure plunger pump in a motor operation of the high-pressure pump, fluid at the predetermined high pressure via the high-pressure line to the working chamber of one of the first and second plunger arrangements depending on the rotational position of the first driveshaft,
• wherein the first driveshaft is coupled to a generator to generate electricity.

A method for operating a high-pressure plunger pump comprising a valve housing comprising a high-pressure connection and a low-pressure connection;

• a first driveshaft;
• a second driveshaft;
• a third driveshaft coupling the first and second driveshafts;
• first and second plunger arrangements, each comprising a working chamber;
• a plunger arranged to move axially back and forth in the working chamber;
• a pressure valve sealably connected, via a high-pressure line in the valve housing, to the working chamber, wherein the high-pressure line is coupled to the high-pressure connection;
• and a suction valve sealably connected, via a low-pressure line in the valve housing, to the working chamber, wherein the low-pressure line is coupled to the low-pressure connection;
• a control unit;
• and a generator coupled to the first driveshaft, wherein the plunger of the first plunger arrangement is coupled to the first driveshaft;
• and wherein the plunger of the second plunger arrangement is coupled to the second driveshaft, the method comprising:
• supplying, by the high-pressure plunger pump, high-pressure fluid from a hydraulic process assembly coupled to the high-pressure plunger pump;
• and
• controlling, by the control unit depending on a rotation position of the first driveshaft, the suction and pressure valves of the first and second plunger arrangements so that the respective plunger of the first and second plunger arrangements drives the first driveshaft, which is coupled to a generator to generate electricity.